公开(公告)号：EP3315306A4

公开(公告)日：2018-07-18

申请号：EP16830519

申请日：2016-07-26

申请人： KYOCERA CORP

发明人： SONOBATA HIDETAKA

IPC分类号： B41J2/14 ,  B41J2/155 ,  B41J2/21

CPC分类号： B41J2/1433 ,  B41J2/14209 ,  B41J2/1609 ,  B41J2/162 ,  B41J2/1625 ,  B41J2/1631 ,  B41J2/1632 ,  B41J2/1634 ,  B41J2/1643 ,  B41J2/1645 ,  B41J2/2125 ,  B41J2002/14225 ,  B41J2002/14459 ,  B41J2002/14475 ,  B41J2202/20

摘要： A liquid ejection head 2 of the present disclosure includes an ejection hole surface 31a at which a plurality of nozzles 8 ejecting liquid open. The ejection hole surface includes a nozzle arrangement region 7 in which the plurality of nozzles 8 are arranged. Each nozzle 8 includes an inversely tapered part 8b where a cross-sectional area increases toward the ejection hole surface 31a. A first nozzle 8-1 of the nozzles 8 is arranged at a center part 7a of a predetermined direction of the nozzle arrangement region 7, while second nozzles 8-2 of the nozzles 8 are arranged at the end parts 7b at the two sides in the predetermined direction. When defining a width of the inversely tapered part 8b when viewed from the ejection hole surface 31a side as "T", the width T of the inversely tapered part of the first nozzle 8-1 is larger than the widths T of the inversely tapered parts of the second nozzles 8-2. In the nozzle arrangement region, the ejection hole surface 31a includes a shape that the center part 7a in the predetermined direction projects with respect to the end parts 7b on the two sides in the predetermined direction.

公开(公告)号：EP3318409A4

公开(公告)日：2018-07-11

申请号：EP16830590

申请日：2016-07-28

申请人： KYOCERA CORP

发明人： SONOBATA HIDETAKA

IPC分类号： B41J2/14 ,  B41J2/16

CPC分类号： B41J2/1631 ,  B41J2/14209 ,  B41J2/1433 ,  B41J2/162 ,  B41J2002/14475

摘要： A nozzle plate 32 of the present disclosure includes a first surface 31a, a second surface 31b on the opposite side to the first surface 31a, and a plurality of through holes 8 which penetrate through the plate from the first surface 31a to the second surface 32b and become nozzles 8. Each of the through holes 8 includes, on at least the first surface 31a side forming the side where the liquid is ejected, an inversely tapered part 8b having a cross-sectional area becoming larger toward the first surface 31a. The first surface 31a includes a first region and a second region which is not superimposed on the first region. A first through hole of one the through holes 8 is arranged in the first region, a second through hole of one the through holes 8 is arranged in the second region. When defining the width of the inversely tapered part 8b when viewed from the first surface 31a side as "T", the width T of the inversely tapered part 8b in the first through hole is larger than the width T of the inversely tapered part 8b in the second through hole. A thickness of the nozzle plate in the first region is thinner than a thicknesses of the nozzle plate in the second region.